Patents Assigned to Aardee Spring & Lock Co., Ltd.
  • Keyless lock
    Patent number: 4799371
    Abstract: A keyless button lock is described in which a plurality of lock buttons are provided, each button requiring a particular number of presses to attain an open or lock release position. A lock element is also provided which, when actuated, returns all buttons to a locked position. The buttons have more than one release or open position so that master and grand master keying can be provided. The lock may be coupled to a door lock mechanism in a single unit to minimize space and complexity. Embodiments of the invention are described.
    Type: Grant
    Filed: May 7, 1987
    Date of Patent: January 24, 1989
    Assignee: Aardee Spring & Lock Co., Ltd.
    Inventor: Robert Duncan